International Business Machines Corporation
Real time estimation of indoor lighting conditions

Abstract:

A method of estimating an indoor lighting condition includes acquiring an image from a camera at a location within an indoor space at a selected time, determining the location from which the image is taken, and estimating an outdoor sunlight density based on the location and the selected time. The method also includes collecting a plurality of daylight factors, each daylight factor of the plurality of daylight factors corresponding to a characteristic of the indoor space, calculating an indoor daylight index for the indoor space in real time based on the outdoor sunlight density and the plurality of daylight factors, and presenting the indoor daylight index to a user in real time.